In addition to the liability of lawyers and tax advisors, the liability of auditors is continuously gaining importance in legal and judicial practice. In particular, the law that came into effect on July 1, 2021, to strengthen financial market integrity (FISG) modifies and tightens the civil liability of auditors in many respects. The presentation includes audit activities in mandatory audits as well as voluntary audits and considers capital market-related and tax advisory activities. In addition to substantive legal liability requirements, procedural issues in enforcing or defending against liability claims are examined, particularly liability towards third parties. The title in brief: - Compact presentation of auditor liability - Current and practical overview of liability norms and requirements in the relevant areas of an auditor's activities - Consideration of relevant procedural issues in liability proceedings - Assistance for one's own legal assessment of potential liability issues in practice - Guidance on liability and damage prevention or claims enforcement.